| 1 | //===--- AvoidCapturingLambdaCoroutinesCheck.cpp - clang-tidy -------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #include "AvoidCapturingLambdaCoroutinesCheck.h" |
| 10 | #include "clang/AST/ASTContext.h" |
| 11 | #include "clang/ASTMatchers/ASTMatchFinder.h" |
| 12 | |
| 13 | using namespace clang::ast_matchers; |
| 14 | |
| 15 | namespace clang::tidy::cppcoreguidelines { |
| 16 | |
| 17 | namespace { |
| 18 | AST_MATCHER(LambdaExpr, hasCoroutineBody) { |
| 19 | const Stmt *Body = Node.getBody(); |
| 20 | return Body != nullptr && CoroutineBodyStmt::classof(T: Body); |
| 21 | } |
| 22 | |
| 23 | AST_MATCHER(LambdaExpr, hasCaptures) { return Node.capture_size() != 0U; } |
| 24 | } // namespace |
| 25 | |
| 26 | void AvoidCapturingLambdaCoroutinesCheck::registerMatchers( |
| 27 | MatchFinder *Finder) { |
| 28 | Finder->addMatcher( |
| 29 | NodeMatch: lambdaExpr(hasCaptures(), hasCoroutineBody()).bind(ID: "lambda"), Action: this); |
| 30 | } |
| 31 | |
| 32 | bool AvoidCapturingLambdaCoroutinesCheck::isLanguageVersionSupported( |
| 33 | const LangOptions &LangOpts) const { |
| 34 | return LangOpts.CPlusPlus20; |
| 35 | } |
| 36 | |
| 37 | void AvoidCapturingLambdaCoroutinesCheck::check( |
| 38 | const MatchFinder::MatchResult &Result) { |
| 39 | const auto *MatchedLambda = Result.Nodes.getNodeAs<LambdaExpr>(ID: "lambda"); |
| 40 | diag(MatchedLambda->getExprLoc(), |
| 41 | "coroutine lambda may cause use-after-free, avoid captures or ensure " |
| 42 | "lambda closure object has guaranteed lifetime"); |
| 43 | } |
| 44 | |
| 45 | } // namespace clang::tidy::cppcoreguidelines |
| 46 |